-/* Copyright (c) 1998, 1999, 2000, 2001, 2003, 2004
- Free Software Foundation, Inc.
+/* Copyright (c) 1998-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#ifndef _NSCD_H
#define _NSCD_H 1
pwddb,
grpdb,
hstdb,
+ servdb,
+ netgrdb,
lastdb
} dbtype;
#define DEFAULT_RELOAD_LIMIT 5
+/* Time before restarting the process in paranoia mode. */
+#define RESTART_INTERVAL (60 * 60)
+
+
+/* Stack size for worker threads. */
+#define NSCD_THREAD_STACKSIZE 1024 * 1024 * (sizeof (void *) / 4)
+
+/* Maximum size of stack frames we allow the thread to use. We use
+ 80% of the thread stack size. */
+#define MAX_STACK_USE ((8 * NSCD_THREAD_STACKSIZE) / 10)
+
+/* Records the file registered per database that when changed
+ or modified requires invalidating the database. */
+struct traced_file
+{
+ /* Tracks the last modified time of the traced file. */
+ time_t mtime;
+ /* Support multiple registered files per database. */
+ struct traced_file *next;
+ int call_res_init;
+ /* Requires Inotify support to do anything useful. */
+#define TRACED_FILE 0
+#define TRACED_DIR 1
+ int inotify_descr[2];
+# ifndef PATH_MAX
+# define PATH_MAX 1024
+# endif
+ /* The parent directory is used to scan for creation/deletion. */
+ char dname[PATH_MAX];
+ /* Just the name of the file with no directory component. */
+ char *sfname;
+ /* The full-path name of the registered file. */
+ char fname[];
+};
+
+/* Initialize a `struct traced_file`. As input we need the name
+ of the file, and if invalidation requires calling res_init.
+ If CRINIT is 1 then res_init will be called after invalidation
+ or if the traced file is changed in any way, otherwise it will
+ not. */
+static inline void
+init_traced_file(struct traced_file *file, const char *fname, int crinit)
+{
+ char *dname;
+ file->mtime = 0;
+ file->inotify_descr[TRACED_FILE] = -1;
+ file->inotify_descr[TRACED_DIR] = -1;
+ strcpy (file->fname, fname);
+ /* Compute the parent directory name and store a copy. The copy makes
+ it much faster to add/remove watches while nscd is running instead
+ of computing this over and over again in a temp buffer. */
+ file->dname[0] = '\0';
+ dname = strrchr (fname, '/');
+ if (dname != NULL)
+ {
+ size_t len = (size_t)(dname - fname);
+ if (len > sizeof (file->dname))
+ abort ();
+ strncpy (file->dname, file->fname, len);
+ file->dname[len] = '\0';
+ }
+ /* The basename is the name just after the last forward slash. */
+ file->sfname = &dname[1];
+ file->call_res_init = crinit;
+}
+
+#define define_traced_file(id, filename) \
+static union \
+{ \
+ struct traced_file file; \
+ char buf[sizeof (struct traced_file) + sizeof (filename)]; \
+} id##_traced_file;
+
/* Structure describing dynamic part of one database. */
struct database_dyn
{
pthread_rwlock_t lock;
+ pthread_cond_t prune_cond;
+ pthread_mutex_t prune_lock;
+ pthread_mutex_t prune_run_lock;
+ time_t wakeup_time;
int enabled;
int check_file;
+ int clear_cache;
int persistent;
int shared;
- const char *filename;
+ int propagate;
+ struct traced_file *traced_files;
const char *db_filename;
- time_t file_mtime;
size_t suggested_module;
- int secure;
+ size_t max_db_size;
unsigned long int postimeout; /* In seconds. */
unsigned long int negtimeout; /* In seconds. */
/* Paths of the file for the persistent storage. */
-#define _PATH_NSCD_PASSWD_DB "/var/run/nscd/passwd"
-#define _PATH_NSCD_GROUP_DB "/var/run/nscd/group"
-#define _PATH_NSCD_HOSTS_DB "/var/run/nscd/hosts"
+#define _PATH_NSCD_PASSWD_DB "/var/db/nscd/passwd"
+#define _PATH_NSCD_GROUP_DB "/var/db/nscd/group"
+#define _PATH_NSCD_HOSTS_DB "/var/db/nscd/hosts"
+#define _PATH_NSCD_SERVICES_DB "/var/db/nscd/services"
+#define _PATH_NSCD_NETGROUP_DB "/var/db/nscd/netgroup"
+
+/* Path used when not using persistent storage. */
+#define _PATH_NSCD_XYZ_DB_TMP "/var/run/nscd/dbXXXXXX"
+
+/* Maximum alignment requirement we will encounter. */
+#define BLOCK_ALIGN_LOG 3
+#define BLOCK_ALIGN (1 << BLOCK_ALIGN_LOG)
+#define BLOCK_ALIGN_M1 (BLOCK_ALIGN - 1)
+
+/* Default value for the maximum size of the database files. */
+#define DEFAULT_MAX_DB_SIZE (32 * 1024 * 1024)
+
+/* Number of bytes of data we initially reserve for each hash table bucket. */
+#define DEFAULT_DATASIZE_PER_BUCKET 1024
+
+/* Default module of hash table. */
+#define DEFAULT_SUGGESTED_MODULE 211
+
+
+/* Number of seconds between two cache pruning runs if we do not have
+ better information when it is really needed. */
+#define CACHE_PRUNE_INTERVAL 15
/* Global variables. */
-extern struct database_dyn dbs[lastdb];
-extern const char *dbnames[lastdb];
-extern const char *serv2str[LASTREQ];
+extern struct database_dyn dbs[lastdb] attribute_hidden;
+extern const char *const dbnames[lastdb];
+extern const char *const serv2str[LASTREQ];
extern const struct iovec pwd_iov_disabled;
extern const struct iovec grp_iov_disabled;
extern const struct iovec hst_iov_disabled;
+extern const struct iovec serv_iov_disabled;
+extern const struct iovec netgroup_iov_disabled;
-/* Number of threads to run. */
+/* Initial number of threads to run. */
extern int nthreads;
+/* Maximum number of threads to use. */
+extern int max_nthreads;
-/* Tables for which we cache data with uid. */
-extern int secure_in_use; /* Is one of the above 1? */
+/* Inotify descriptor. */
+extern int inotify_fd;
/* User name to run server processes as. */
extern const char *server_user;
means unlimited. */
extern unsigned int reload_count;
+/* Pagesize minus one. */
+extern uintptr_t pagesize_m1;
+
+/* Nonzero if paranoia mode is enabled. */
+extern int paranoia;
+/* Time after which the process restarts. */
+extern time_t restart_time;
+/* How much time between restarts. */
+extern time_t restart_interval;
+/* Old current working directory. */
+extern const char *oldcwd;
+/* Old user and group ID. */
+extern uid_t old_uid;
+extern gid_t old_gid;
+
+
/* Prototypes for global functions. */
+/* Wrapper functions with error checking for standard functions. */
+#include <programs/xmalloc.h>
+
/* nscd.c */
extern void termination_handler (int signum) __attribute__ ((__noreturn__));
extern int nscd_open_socket (void);
+void notify_parent (int child_ret);
+void do_exit (int child_ret, int errnum, const char *format, ...);
/* connections.c */
extern void nscd_init (void);
+extern void register_traced_file (size_t dbidx, struct traced_file *finfo);
+#ifdef HAVE_INOTIFY
+extern void install_watches (struct traced_file *finfo);
+#endif
extern void close_sockets (void);
extern void start_threads (void) __attribute__ ((__noreturn__));
extern int receive_print_stats (void) __attribute__ ((__noreturn__));
/* cache.c */
-extern struct datahead *cache_search (request_type, void *key, size_t len,
- struct database_dyn *table,
+extern struct datahead *cache_search (request_type, const void *key,
+ size_t len, struct database_dyn *table,
uid_t owner);
extern int cache_add (int type, const void *key, size_t len,
struct datahead *packet, bool first,
- struct database_dyn *table, uid_t owner);
-extern void prune_cache (struct database_dyn *table, time_t now);
+ struct database_dyn *table, uid_t owner,
+ bool prune_wakeup);
+extern time_t prune_cache (struct database_dyn *table, time_t now, int fd);
/* pwdcache.c */
extern void addpwbyname (struct database_dyn *db, int fd, request_header *req,
void *key, uid_t uid);
extern void addpwbyuid (struct database_dyn *db, int fd, request_header *req,
void *key, uid_t uid);
-extern void readdpwbyname (struct database_dyn *db, struct hashentry *he,
- struct datahead *dh);
-extern void readdpwbyuid (struct database_dyn *db, struct hashentry *he,
- struct datahead *dh);
+extern time_t readdpwbyname (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
+extern time_t readdpwbyuid (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
/* grpcache.c */
extern void addgrbyname (struct database_dyn *db, int fd, request_header *req,
void *key, uid_t uid);
extern void addgrbygid (struct database_dyn *db, int fd, request_header *req,
void *key, uid_t uid);
-extern void readdgrbyname (struct database_dyn *db, struct hashentry *he,
- struct datahead *dh);
-extern void readdgrbygid (struct database_dyn *db, struct hashentry *he,
- struct datahead *dh);
+extern time_t readdgrbyname (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
+extern time_t readdgrbygid (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
/* hstcache.c */
extern void addhstbyname (struct database_dyn *db, int fd, request_header *req,
request_header *req, void *key, uid_t uid);
extern void addhstbyaddrv6 (struct database_dyn *db, int fd,
request_header *req, void *key, uid_t uid);
-extern void readdhstbyname (struct database_dyn *db, struct hashentry *he,
- struct datahead *dh);
-extern void readdhstbyaddr (struct database_dyn *db, struct hashentry *he,
- struct datahead *dh);
-extern void readdhstbynamev6 (struct database_dyn *db, struct hashentry *he,
+extern time_t readdhstbyname (struct database_dyn *db, struct hashentry *he,
struct datahead *dh);
-extern void readdhstbyaddrv6 (struct database_dyn *db, struct hashentry *he,
+extern time_t readdhstbyaddr (struct database_dyn *db, struct hashentry *he,
struct datahead *dh);
+extern time_t readdhstbynamev6 (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
+extern time_t readdhstbyaddrv6 (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
+
+/* aicache.c */
+extern void addhstai (struct database_dyn *db, int fd, request_header *req,
+ void *key, uid_t uid);
+extern time_t readdhstai (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
+/* initgrcache.c */
+extern void addinitgroups (struct database_dyn *db, int fd,
+ request_header *req, void *key, uid_t uid);
+extern time_t readdinitgroups (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
+
+/* servicecache.c */
+extern void addservbyname (struct database_dyn *db, int fd,
+ request_header *req, void *key, uid_t uid);
+extern time_t readdservbyname (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
+extern void addservbyport (struct database_dyn *db, int fd,
+ request_header *req, void *key, uid_t uid);
+extern time_t readdservbyport (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
+
+/* netgroupcache.c */
+extern void addinnetgr (struct database_dyn *db, int fd, request_header *req,
+ void *key, uid_t uid);
+extern time_t readdinnetgr (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
+extern void addgetnetgrent (struct database_dyn *db, int fd,
+ request_header *req, void *key, uid_t uid);
+extern time_t readdgetnetgrent (struct database_dyn *db, struct hashentry *he,
+ struct datahead *dh);
+
/* mem.c */
-extern void *mempool_alloc (struct database_dyn *db, size_t len);
+extern void *mempool_alloc (struct database_dyn *db, size_t len,
+ int data_alloc);
extern void gc (struct database_dyn *db);
/* nscd_setup_thread.c */
-extern void setup_thread (struct database_dyn *db);
+extern int setup_thread (struct database_dyn *db);
+
+
+/* Special version of TEMP_FAILURE_RETRY for functions returning error
+ values. */
+#define TEMP_FAILURE_RETRY_VAL(expression) \
+ (__extension__ \
+ ({ long int __result; \
+ do __result = (long int) (expression); \
+ while (__result == EINTR); \
+ __result; }))
#endif /* nscd.h */
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